Kristen Wiig made an appearance last night’s (June 28) episode of The Tonight Show Starring Jimmy Fallon, and participated in a hilarious, hospital-themed version of Mad Lib Theater!

The 43-year-old actress had to say random words to fill in the blanks for a scene that she would then perform alongside Jimmy. In the scene, Kristen played a doctor getting a visit from her “favorite patient,” played by Jimmy.